" The metal present in Vitamin "B_(12)" is "

The metal ion present in vitamin B_12 is

(a) Name the metal present in Vitamin- B_(12) . (b) What is Zwitter ion? (c) Name the metal present in green leaves.

The element present' in vitamin B_12

Which of the following transition metal is present in Vitamin B_(12) ?

Name the metal present in:- Vitamine B_12 .